Refining plate



FIG. 1 is a perspective view of a refining plate showing our new design;

FIG. 2 is a right side elevational view;

FIG. 3 is a left side elevational view;

FIG. 4 is a radially outer end elevational view;

FIG. 5 is a radially inner end elevational view;

FIG. 6 is a top plan view; and,

FIG. 7 is a bottom plan view. 

The ornamental design for a refining plate, as shown and described. 